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3 Sheets-Sh1eet 1.

(No Model.)

- A. CAMPBELL.

PRINTING PRESS.

Patented Aug. 14, 1883.

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NV PETERS. Plwhfljlhunphcr. Washington. D. c

(No Model.) 3 Sheets-Sheet 2.

A. CAMPBELL.

PRINTING PRESS. No. 283,201. Patented Aug. 14, 1883.

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PRINTING PRESS. No. 283,201. Patented'Aug. 14, 1883.

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WITNESSES: I INVENTQR: 7

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UNITED STATES PATENT QFFICE.

ANDREW cA vIPBELL, or BROOKLYN, Assicnon TO JOHN MOLOUGHLIN AND EDMUNDMCLOUGHLIN, or Nnwxonx, N. Y.

PRINTING-PRESS.

" SPECIFICATION forming part of Letters Patent No. 283,201, dated August14, 1883,

Application filed June 20, 1882. (Nomodei) To all whom it may concern:

Be it known thatI, ANDREW CAMPBELL, a citizen of the United States,residing 'at Brooklyn, Kings county, New York, have invented certainImprovements in Printing- Presses, being a meansfor effecting thedelivery of the printed sheet from the printing cylinder, of which thefollowing is aspecification. I

My invention appertains to. presses of the bed and cylinder class,having a sheet-delivery at the back under the feeding-table, and whereinthe sheet is freed before the cylinder has made one entire revolution.Heretofore in nearly all presses of this character the sheet, when freedby the printing-cylinder, is trans ferreddirectly to a second cylinderor drum, (or to a series of narrow pulleys substituted for a drum,) andtapes or fingers carry the sheet with its freshly-printed surface incontact with the drum until the advancing or front edge of the sheet isturned in a downward direction, when it either slides the whole lengthof afly, or is carried by ordinary tapes until freed by the biting tapeswhich bind it .to the discharging-drum, or by a biting-roller as asubstitute for the tapes. liberated and set violently in motion, itcomes in contact with the freshly-printed face of the sheet, arrests thesheet in its forward motion edgewise, and carries it over facewise in anarc until it is placed face up on the receivingtable. The fly rests foran instant and then turns back to receive the next sheet. It will beobserved that. in this case the freshly; printed side of the sheetisduring its entire delivery in contact with some portion of the deliveryapparatus, the peculiar construction of which in all cases presentssurfaces moving at two different velocities to the freshly-printedsurface upon which the sheet must travel to its final discharge, andtherefore must, of necessity, have a sliding motion on some one of thesurfaces in contact. This will inevitably smut the sheet to some extent.This differin grooves in the drum, then the surfaces of the tapeswillhavea variable velocity. At the point where they break over the drumthe up per surfaces of the tapes will have avelocity equal to thevelocity of the general periphery of the drum, but beyond this point thewhole tape will move with a velocity about equal to that of the surfaceof the drum at the bottom of the groove, as in the case of any belt andpulley. If no tapes are employed, the sheet must slideover the fingersof the fly which are at rest. Several attemptshave been made to obviatethis difficulty, but thus far 110 delivering apparatus has beenconstructed adapt able to this type of press, except such as con tainedthe defect above noted, and which would cause more orless mackle orslur.

The object of my invention is to deliver a sheet below or under thefeeding-table with the printed side up, and without any portion of theprinted surface coming in contact with any portion of the deliverymechanism, or any other part,- wherebyI obtain a clean andperfectly-printed sheet without mackle, slur, or smut, and withoutreference to the amount of ink employed. To accomplish this I employmeans forseizing the advancing edge of the sheet, turning or rolling it,and carrying it back to a rest, and holding it fast while the sheet isturned by the advancing movement .of the cylinder, aided by jets of airwhich uphold the body of the sheet and assist to turn it. To avoidcounter-currents of air exteriorly, which would fold the tail or cornersof the sheet back upon the body before it could be laid, I provide aclose roof plate or shield, with side plates, arranged over themechanism, and to ing-table. To avoid disturbing the sheets alreadylaid, I also'arrangethe mechanism in such a way as to hold the edge ofthe sheet being -delivered out of contact with the pile until the saidsheet is fairly laid on the table,

when the said edge is released.

In the drawings, which serve to illustrate my invention, I have notdeemed it necessary extend over, or substantially over, the receivtoshow the entire printing-press, limiting the v illustration to the noveldelivery apparatus and to those parts of the press which operate inconnection therewith. I

Figure 1 is a longitudinal vertlcal section taken in the plane of line 11 in Fig. 2, being I leaves the printing-cylinder and adheres bysubstantially a side elevation of the delivery mechanism. Fig. 2 is atransverse vertical section substantially on line 2 2 in Fig. 3, thepart of the delivery apparatus to the left being in elevation, viewedfrom the rear of the press. Fig. 3 is aplan of the mechanism, thefeeding-table and roof-plate being removed.

Figs. 4 and- 5 are detached sectional views taken on lines 4. 4 and 5 5,respectively, in Fig.

2. Fig. 6 is a'detache d View of the air-valve This position of thecylinder is chosen for the reason that it is at this moment thedelivering mechanism has reached the end of its stroke with thelast-printed sheet.

On the end of the printing-cylinder is a' cam-groove, c,- in which playsa roller, 0, mounted on a toothed segment, D. This seg ment is mountedon an axis, (1, fixed in the main frame,and oscillated through a predetermined are at every revolution of the cylinder, being actuated by thecam c. The teeth of this segment mesh with teeth on a pinion, c, fixedon the end of a partly-hollow shaft, f, mounted rotatively andtransversely in the press-frame and extending across from side to side.On this shaft are fixed two or more arms, g, one of which is hollow, andthe cavity in which communicates with that in the shaft. In the ends ofthese arms is rotatively mounted a hollow shaft, h, .provided with anumber of short tubular suckers or nozzles, z i. There is aircommunication through these nozzles 13 i, the shaft h, hollow arm andshaft f with an air-exhaust pipe, j, Fig. 3, through an ordinary diskcut-off valve, E, which will be referred to more particularlyhereinafter.

The arm 9 to the right in Figs. 2 and 3 is the hollow arm, and only theright-hand end of shaft f need be hollow, although it might be hollowthroughout and all of the arms 9 be hollow as well.

On turning theeylinder B in the direction of the arrow the cam 0 acts onsegment D in a manner to first rotate shaft f and swing the arms 9, withshaft h, over toward the cylinder until the nozzles i assume theposition shown in dotted lines at 00 in Fig. 1. Then, as the cylindercontinues to rotate, the said parts turn back again, the nozzles z"reaching the point 9 as the grippers with the advancing edge-of thenewly-printed sheet (shown in dot v ted lines) reach the same point andrelease their hold. At this moment the exhaust begins to act and theadvancing edge of the sheet atmospheric pressure to'the nozzles z. The

continued rotation of the cylinder swings the nozzles 011 over backagain, bearing the sheet toward the position shown in full lines inFig. 1. The movement of the nozzles is not, however, quite rapid enoughto keep the sheet taut or strained as it leaves the cylinder, but

allows it to belly upward in an arch, a series of narrowbearing-rollers, k-two or morebeing provided to keep the sheet up to thecylinder below the point 9 i In order to turn or roll the edge of theprinted sheet properly, I provide a means for slowly rotating the shaftit partly around in its bearings as the shaft f swings said shaft 71vback. This means consists of a camgroove in a fixed plate, Z, Figs. 1,2, and 3, in which plays a stud or roller, Z, on atoothed segment, m,mounted to oscillate on one of the arms 9. This segment meshes with apinion, m, on the end of shaft 71-.

In Fig. l I have broken away part of plate Z and part of pinion e, thebetterto show the parts beyond, and have indicated the shape of thecam-groove in Z by dotted lines at n, as it is on the opposite face ofthe plate. It will be a sufficient description of this cam-grooveto 5- isay that it is a nearly-circular curve drawn slightly eccentric to theshaft f, and that its effect is to cause the nozzles i to swing,independently of shaft f, through an arc of about one hundred and twentydegrees as they pass from the point 00 to the delivery-point. As thenozzles approach the latter point, however, the roller 1 enters a partof the cam-' groove n, which turns the'nozzles sharply down upon a shelfor rest, 0, which will be re- I05 ferred to more particularlyhereinafter. At this moment the exhaust is broken or cut off,

by valve E, and the-sheet is held by the nozzles t on the shelf 0 as agripper.

I have now described the mechanical devices 1 10 for carrying theforwardedge of the sheet from the printing-cylinder over to thedelivery-pointf Other=mcans, however, are employed' to assist in turningover the body and tail of the sheet, in order that it may be prop- 11'5erly delivered with the printed side up on the receiving-table F. Thismeans I will now describe.

G in Fig. 3 is a blower-pipe, which connects through the valve E andpipe H with an and j ets from the tubes 1) take under the bellyr 0 ingsheet and bear it upward and backward,

being limited .by a-roof-plate or shield, J, which is arranged over thedelivery mechanism and extends out over or nearly over the receiving-The lat- 1'25 I gradually turning it over and down, the jets of aircause the'sheet to assume the position shown by the dotted lines 2 inFigs. 1, 4, and

5that is tosay, well on its way toward being turned completely over.

On one of the arms g is a rigid projection, 1', which, when the armsassume the advanced position shown in Fig. 4, impinges against an arm,5, on the shaftt, to which the shelf 0 is.

attached, and turns said shaft on its axis, thus displacing saidshelfand opening the jet-tubes q, the mouths of which stand normallycovered by the shelf 0. This causes jets of air from the tubes qto bedirected backward horizontally over the sheet to complete its inversion.

The movement of the sheet in straightening.

I out is indicated by the dotted lines zin Fig.1.

Toavoid counter-currents and preventthe air from escaping laterallyImake the roof-plate or shield J solid or unperforated, and provide Theshaft t is provided with a spring, 1;, Fi 2, which turns it with sideplates or walls, a.

it back and causes the shelf 0 to again close the jet-tubes (1, when thenozzles 1' rise and re lease the sheet. The edge of the sheet is heldgripped between the nozzles i and the shelf or the sheets already laidthereon.

rest 0 until the sheet is fairly at rest on the re ceiving-tab1e, andthe gripping-point is raised above said table in order not tointerferewith The sheet, in turning, may or may not touch the shield orroof-plate J.

The nozzles 36 are attached to sleeves which slip over the shaft h, anaperture inthe shaft coinciding with the bore in'the' nozzle when thelatter is inoperative position. If it be desired to cut off one or moreof the nozzles, it is only necessary to loosen the set-screws whichsecure the sleeves in position on the shaft h and turn said sleevesuntil the apertures are out of coincidence, when the exhaust w ill becut off.

wheel w of the same diameter on the axis of,

the printing-cylinder, whereby the valve is caused to rotate in unisonwith said cylinder. The valve is provided withairecess, a, to connectthe exhaust-pipej and hollow shaft f for the proper interval, and anaperture or port,

I), to coincide with the end of shaft f at the instant of delivery tobreak the exhaust and free the sheet from the nozzles 13. The valve isalso provided with a recess, (1, of variable width to connect theblower-pipes G and H. The object in making this recess of variable widthis to provide an increased volumeaof air at the moment of delivery, inorder to supply the tubes qwhen opened, and to furnish a diminishedblast at the beginning.

over with the printed face uppermost.

until the sheet turns completely over.

table. As the nozzles 'i bear its edge onward, I Rotary-disk valves forcutting off and adand I have not deemed. it necessary to show these inthe drawings.

' I wish it understood that I do not limit myself to the preciseconstruction and arrangement of the mechanical parts herein shown, asthey may be varied somewhat without departing from thespirit of myinvention-as,-

for example, the cam 0 may not be on the cylin- (ler B, but be drivenfrom the same motor, and the valve E may be driven by other meansthanthegearing shown. I

It must be understood that thesheet is seized by its advancing edge,carried back only far enough to clear themechanism, and turned Thecarrying back is only required in order to clear the mechanism and tobring the body of the sheet over the air-jets. .Some room is alsorequired in which to turn the sheet, and the advancing edge is held downfast in position The roof-plate J prevents the sheet from being blownaway by the jets. be impracticable to regulate the blast so nicely as tosuspend the sheet properly in the air.- VVith it it is only necessarythat the blast shall have force enough, and an excess of force withinlimits will do no harm.

Having thus described my claim 1. A sheet-delivery mechanism forcylinder printingpresses, constructed and ar anged to operatesubstantially as set forth, and comprising, first, means for taking theadvancing edge of the sheet by its margin, means for turning or rollingsaid edge and carryingit over and clamping it down upon a rest, and forholding itso clamped until the body of the sheet is turned by themovement of the printing-cylinder, second, an air-blast device arrangedto assist in turning the body and tail of the sheet; third, a closeroof-plate or shield, with side plates arranged over the deliverymechanism to prevent counter-currents; fourth, means for releasing thesheet when it is laid on a receiving-table; and, fifth, areceiving-table for the sheets, arranged under the shield, all combinedand arranged to operate substantiallyas and for the purposes set forth.I

2. In a sheet-delivery mechanism for printinvention, I

ing-presses, the mechanism for gripping. and

Without it it would 3. A sheet-delivery mechanism for printing presses,substantially as described, comprising two or more nozzles connectedwith an airexhaust apparatus, and arranged totake the 5 advancing edgeof the printed sheet from the printing-cylinder and carry it back to thedelivery-point, suitable mechanism for actuating said nozzles, jet=pipesconnected with a blowing apparatus arranged to emit jets of air un- 1oder the sheet as it is being borne back, and a suitable Valve or valvesto control the exhaust and air currents, all arranged to operatesubstantially as set forth.

4. The combination, in a sheet delivery 1 mechanism, of the air-trunk I,provided with jet-tubes p and q, said trunk being connected with acontrolled air-blast, the roof-plate J, and the shelf 0 for closing thejet-tubes q, all arranged to-operate substantially as set forth.

20 v 5. The combination of theprinting-cylinder,

the oscillating segment 1), the cam O, for actuating said segment, theshelf f, bearing the pinion c and arms 9, the shaft 72, provided withnozzles t and pinion m, the segment on, the 2 5 fixed cam-plate 1,provided with a cam-groove to actuate segment m, the shelf 0, arrangedto be depressed by arm 9, and the air-trunk, provided with j et-tubes pand q, and arranged to receive a regulated supply of air from anairforcing mechanism, all arranged to operate 30 substantially as setforth.

6. The combination, in a sheet delivery mechanism for printing-presses,of an oscillating shaft, f, partly hollow and connected with acontrolled exhaust, and provided with arms 3 5 g, mechanism,substantially as described, for

' oscillating said shaft in unison with the movements of theprinting-cylinder, ahollow shaft, 71, provided with suction-nozzles 'i,and rotatively mounted in the arms 9, mechanism, constructedsubstantially as described, for giving the shaft an oscillatory movementindependent of the shaft f, whereby the sheet is turned over as it isborne back, jet-pipes connected with a blowing apparatus arranged toemit jets of air 45 under the sheet as it is being borne back andturned, and a roof-plate, J, all arranged to operate substantially asset forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

ANDREW CAMPBELL.

